J/AJ/125/478 HST imaging of brightest cluster galaxies (Laine+, 2003)
Hubble space telescope imaging of brightest cluster galaxies. Laine S., Van Der Marel R.P., Lauer T.R., Postman M., O'Dea C.P., Owen F.N. <Astron. J., 125, 478-505 (2003)> =2003AJ....125..478L
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry Keywords: elliptical and lenticular, cD - galaxies: evolution - galaxies: nuclei - galaxies: photometry - galaxies: structure Abstract: We used the Hubble Space Telescope Wide Field Planetary Camera 2 to obtain Iband images of the centers of 81 brightest cluster galaxies (BCGs), drawn from a volume-limited sample of nearby BCGs. The images show a rich variety of morphological features, including multiple or double nuclei, dust, stellar disks, point-source nuclei, and central surface brightness depressions. Highresolution surface brightness profiles could be inferred for 60 galaxies. Of those, 88% have well-resolved cores. Description: All images were taken with the Wide Field Planetary Camera 2 (WFPC2) instrument on board the HST between 2000 July 3 and 2001 July 26. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 111 81 Sample of Abell Cluster BCG Galaxies Cluster table4.dat 75 81 Properties of BCGs and Their Host Clusters
See also: VII/4 : Abell and Zwicky Clusters of Galaxies (Abell+ 1974) VII/110 : Rich Clusters of Galaxies (Abell+ 1989) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Cluster Cluster name 12- 22 A11 --- OName Other name 24- 25 I2 h RAh Right ascension of the BCG center (J2000.0) (1) 27- 28 I2 min RAm Right ascension of the BCG center (J2000.0) (1) 30- 34 F5.2 s RAs Right ascension of the BCG center (J2000.0) (1) 36 A1 --- DE- Declination sign of the BCG center (J2000.0) (1) 37- 38 I2 deg DEd Declination of the BCG center (J2000.0) (1) 40- 41 I2 arcmin DEm Declination of the BCG center (J2000.0) (1) 43- 46 F4.1 arcsec DEs Declination of the BCG center (J2000.0) (1) 48- 52 I5 km/s cz Heliocentric velocity cz for the BCG 54- 59 F6.2 Mpc Dist Angular diameter distance of the BCG 61- 65 F5.2 mag Rmet R-band metric magnitude in an aperture of 10h-1kpc 67- 72 F6.2 mag VMAG Total absolute V-band magnitude 74- 78 F5.2 [solLum] logLV Total V-band luminosity 80 A1 --- F4 [YSN] Profiles are shown in Fig.4 (2) 82- 87 F6.1 --- North Orientation on the sky of the images that are shown in Fig. 1. 89- 93 F5.3 mag E(B-V) Foreground reddening E(BV) 95-111 A17 --- Notes Identifies any special features seen in the HST images (3)
Note (1): Galaxies identified as [LVL2003] JHHMMSS.ss+DDMMSS.s in Simbad Note (2): Profiles code as follows: Y = an accurate surface brightness profile could be determined and fitted with the Nuker formulation S = we were able to derive a surface brightness profile that was not accurate enough for fitting N = it was impossible to derive any reasonable surface brightness profile. Note (3): Notes as follows: Sp = spiral galaxy morphology; MN = multiple nuclei (see Sect. 3.1) Double = double nucleus (see Sect. 3.1) Dust = dust absorption features (see Sect. 3.2) Disk = the circumnuclear morphology has a high ellipticity, suggesting the possible presence of an edge-on nuclear disk (see Sect. 3.3) Nuc = bright point-like nucleus, most likely associated with an AGN (see Sect. 4.2) Hollow = depression in the surface brightness in the very nucleus (see Sect. 4.4).
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Cluster Cluster name 14- 19 A6 --- BM Bautz-Morgan cluster morphology classification 22- 28 F7.3 mag RMAG Absolute R-band metric magnitude of the BCG inside an aperture of 10kpc radius 30- 34 F5.3 --- alpha Parameter α, which measures the logarithmic slope of the metric luminosity as a function of radius, determined at a physical radius of 10kpc 36- 41 F6.3 --- delta Residual δ between the observed metric luminosity and that predicted by the BCG standard-candle relation between metric luminosity and alpha 43- 47 F5.3 mag B-R B-R color index at the metric radius after correcting for Galactic extinction and Kdimming 49- 51 I3 --- Rich Richness Abell richness count 53- 57 F5.3 Mpc Sep Projected separation of the BCG from the cluster center 59- 62 I4 km/s VelDiff Difference between the line of sight velocity of the BCG and the systemic velocity of the cluster 64- 69 F6.1 km/s sigma ?=- Available velocity dispersion for clusters that have measured redshifts for at least 20 member galaxies 71- 75 F5.3 10+37W LX ?=- X-ray luminosities from the compilation of Jones & Forman, 1999, Cat. J/ApJ/511/65 (1)
Note (1): All data are based on Postman & Lauer (1995, Cat. J/ApJ/440/28), unless otherwise noted.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 10-Jan-2008
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